High-cocoa chocolate contains compounds called polyphenols, which research shows may keep blood vessels dilated and help lower blood pressure. But before making a daily habit of the dark sweets, be mindful that along with cocoa comes saturated fat and sugar. “You may think it’s good for your heart, which it can be if eaten in moderation. But go overboard and you’ll get lots of calories that can pile on weight, which isn’t heart healthy at all,” Zuckerbrot says. Look for brands with the highest percentage of cocoa and opt for smaller packages versus the temptation of larger bars.